KR101157304B1 - Grounding style Ion transfer current generating method and Skin beauty apparatus using it - Google Patents

Abstract

The present invention,

It relates to a grounding type ion current generation method and a skin care device using the same,

It provides a method and a skin care device configured to simultaneously output the iontophoretic current through one surface of the skin contact surface of the ultrasonic vibrator. In the present invention, in the method of outputting the iontophoretic current to the skin, unlike the conventional method, the ultrasonic wave in the form where the skin contact part is electrically energized with the ground electrode of the piezoelectric element and grounded at zero volt potential Disclosed is a grounding type ion current generation method that outputs an ion current current through the skin contact surface of an ultrasonic vibrator by selectively outputting (+) or (-) ion current through an earth grip despite an oscillator condition. Accordingly, a process of electrically insulating the piezoelectric element ground electrode is unnecessary to construct a conventional ultrasonic vibrator for iontophoresis, and the attenuation of the ultrasonic vibration efficiency due to the insulation process is reduced, and manufacturing cost can be reduced. Therefore, the present invention provides a skin care device having a variety of configurations through the method of generating the ground-type ion-induced current, while maintaining a stable ultrasonic output through the means for correcting the frequency of driving the ultrasonic wave and the resonance frequency of the ultrasonic vibrator The cosmetic apparatus is disclosed.

(The meaning of the ground is a circuit ground separated by a common electrode with one side of the electrical circuit wiring at zero volt potential.)

Ultrasonic vibrator, piezoelectric element, iontophoresis, ultrasound, skin care device, exfoliation, massage

Description

Grounding style ion transfer current generating method and Skin beauty apparatus using it}

The present invention

It relates to a grounding type iontophoretic current generating method and ultrasonic skin care device using the same,

As a method for outputting an iontophoretic current to an ultrasonic vibrator with an iontophoretic function,

The skin contact part of the ultrasonic vibrator is electrically connected to the ground electrode of the piezoelectric element so that it is grounded at zero (0 volt) potential, and selectively outputs (+) or (-) ion current through the earth grip. The present invention relates to a connection structure and a skin care device capable of generating an iontophoretic function regardless of the operation of ultrasonic waves by generating a special grounding type iontophoretic current to pass through a skin contact area.

Ultrasound refers to sound vibrations above 20KHz. As a definition of ultrasonic waves used in technical applications, sound waves that are not intended to be heard are sometimes referred to as ultrasonic waves. The ultrasonic wave is converted into physical vibration energy and brought into contact with the skin to generate a cosmetic effect. The iontophoresis is a water-soluble solution that is difficult to penetrate the skin by using the principle of chemical reaction caused by negative (-) and positive (+) properties when passing through the skin containing a certain amount of moisture by using minute DC or pulse current. It absorbs the active ingredients of the agent into the skin or, conversely, has the effect of discharging waste products from the skin out of the skin. This principle is applied to skin care devices.

Among the skin care devices, there are an ultrasonic beauty device configured as a means for removing dead skin or massaging the skin, and an iontophoretic device as a means for infiltrating active ingredients into the skin or discharging waste products. In some cases, a skin care device configured to perform both an ultrasound function and an iontophoretic function is widely used for skin care.

The skin care device uses an ultrasonic vibrator that combines a piezoelectric element and a diaphragm to generate physical ultrasonic vibrations. The ultrasonic vibrators vary in appearance depending on the purpose of use, but are equivalent in principle of using ultrasonic vibrations. can do.

In the construction of a skin care device that combines an ultrasonic function and an iontophoretic function, in general, a method of forming an electrical passage so as to apply an ion current from the inside to a diaphragm (skin contact) of an ultrasonic vibrator is common. For this method, a method of forming an electrically independent skin contact (vibration plate) using an electrically insulating substrate between the ground electrode of the piezoelectric element and the vibration plate has been required.

In this method, the vibration energy generated from the piezoelectric element is transmitted to the diaphragm, and the attenuation effect due to passing through the metal and nonmetal layers cannot be excluded, and the attenuated energy causes stress on the electrically insulating substrate, which causes the vibration plate from the piezoelectric element. It is true that the result of breakage of the attachment part between them is common.

In general, a method of outputting an iontophoretic current to the skin generates a direct current or pulse voltage to generate the electrically independent skin contact part (+), the earth grip side (-), or the skin contact part (-), and the earth grip. The side is a method of alternately outputting a positive current, and neither of the output currents can be connected in common with the ground electrode of the piezoelectric element.

In order to solve this problem, the ultrasonic vibrator using an electrically insulating substrate is described in Japanese Patent PCT / JP 98/01820, and in Korean patents 10-2005-0023462 and 10-2006-0013476, an exfoliating skin beauty device using the same is used. have. Such a conventional technology requires a plurality of piezoelectric elements to compensate for the amount of attenuation of ultrasonic vibrations, and thus it is a reality that manufacturing cost or driving stability cannot be considered.

In addition, domestic patents 20-2003-0019120 and 20-2004-0015333 of the conventional ultrasonic massage skin care device also show a constituent means for iontophoretic output by using an electrically insulating substrate, and ultrasonic waves without using an electrically insulating substrate. There is no preferred way to combine output and iontophoresis. The electrically insulating substrate is often used an epoxy substrate or the like.

The piezoelectric element, which is a component of the ultrasonic vibrator, changes its resonant frequency according to the change of ambient temperature or the load change during use. In addition, due to different resonance frequency error ranges for each piezoelectric element, the electrical driving impedance is also changed, and the ultrasonic output is deteriorated. In the conventional ultrasonic beauty device, the driving frequency is generated by the positive feedback oscillation method using the resonant frequency of the piezoelectric element, so that the resonant frequency is slightly changed by driving the ultrasonic vibrator. In some cases, the oscillation frequency of the piezoelectric element causes a decrease in the ultrasonic vibration output, and a new method is continuously required to solve this problem.

In particular, the skin care device for exfoliation using the BLT type ultrasonic vibrator is too large to expect a smooth operation because the element that the ultrasonic power is lowered is relatively large compared to other ultrasonic vibrators.

The first problem to be solved in the present invention,

The present invention is to construct a characteristic skin care device capable of performing iontophoresis function through the configuration of an ultrasonic vibrator using an ultrasonic vibrator that does not form an electrically insulating substrate and a ground type iontophoretic current generation method.

A second problem is to provide a skin care device that can use an ultrasonic wave oscillator of the same type that does not form an electrically insulating substrate through a ground type ion induction current generation method.

As a third object of the present invention , there is provided a skin care device that minimizes a decrease in the ultrasonic vibration output in response to a resonance frequency change characteristic or a resonance frequency error of an ultrasonic vibrator caused by ambient temperature or load variation.

As a means for solving the above first problem ,

MCU for controlling the overall operation of the skin care device,

Power supply unit for supplying driving power under the control of the MCU,

Ultrasonic output unit for applying the ultrasonic driving power to the ultrasonic vibrator under the control of the MCU,

An ultrasonic vibrator which electrically connects the ground electrode of the piezoelectric element and the diaphragm [skin contact part] to contact the skin with ultrasonic vibration and iontophoretic current,

Earth grip connected to the ground type ion induction current generator to electrically connect the ion induction current to the human body,

According to the control of the MCU, the ground type ion induction current generating unit which causes one pole which outputs the ion induction current to be grounded to zero (0 volt) potential and selectively alternately outputs the ion current polarity of the other pole,

A square wave voltage output unit for applying a square wave voltage to the ground type ion current introducing unit under control of a MCU;

It consists of a function changeover switch that inputs an operation command to the MCU.

The "ground type ion current introduction unit" is a component unit for performing a ground type ion current introduction method, a phase control means using a microcontroller unit (MCU), and a switching element for interrupting current. Or FETs, photocouplers, high speed relays, logic gates, etc.).

The frequency required for the iontophoresis or the frequency for driving the ultrasonic vibrator may be different depending on the purpose of use of the device, and is not particularly limited.

The "ultrasound output unit" is a method of amplifying by applying a PWM frequency output from the MCU or

By using the resonant frequency of the ultrasonic vibrator can be output by forward oscillation in the ultrasonic output unit.

In addition, as a means for solving the second problem ,

Ultrasonic vibrator having a blade-type diaphragm (skin contact) formed and attaching a piezoelectric element to the surface of the auxiliary member combined with the diaphragm, or

BLT (Bolt-clamped Langevin-type Transducer) type ultrasonic vibrator with blade type diaphragm (skin contact), or

Ultrasonic vibrator having a disk-shaped or conical, flat polygonal skin contact surface (vibration plate) and attaching a piezoelectric element to the inner surface of the vibration plate,

As shown in FIG. 2, the ground type ion induction current is generated so that the ion current can be applied to the diaphragm by using an ultrasonic vibrator that does not use an electrically insulating substrate so that the diaphragm [skin contact part] and the ground electrode of the piezoelectric element are electrically connected. .

The blade, the diaphragm member or the auxiliary member for the configuration of the ultrasonic vibrator of the first to the second object is preferably made of stainless steel (aluminum), aluminum (aluminum) or titanium (titanium), In the solution, the type or processing of the member is not limited, and the size or thickness is not limited to fluidity depending on the vibration frequency of the piezoelectric element used.

The BLT (Blt-clamped Langevin-type Transducer) type ultrasonic vibrator is integrally formed by fastening one or more piezoelectric elements, a metallic auxiliary member, and a diaphragm with a bolt, and forming a blade to remove skin dead skin. It consists of means.

Ultrasonic vibrator in which the disk-shaped or conical diaphragm [skin contact part] is formed and attaches a piezoelectric element to the inner surface of the diaphragm can be configured in various forms according to the skin contact form. The form of the [skin contact part] is not limited.

As a means for solving the third problem ,

Frequency oscillator, such as MCU or PWM, which generates the driving frequency of ultrasonic vibrator,

A pulse width modulation (PWM) frequency synchronization unit synchronized with the driving frequency;

A frequency spreading control unit for spreading the synchronized driving frequency;

An ultrasonic output unit for supplying the driving frequency to an ultrasonic vibrator,

MCU for controlling the frequency diffusion control unit and the ultrasonic output unit;

And a power supply unit for supplying power.

The generation of the ultrasonic oscillator driving frequency may use the PWM function of the MCU.

The synchronization unit for synchronizing with the PWM frequency and performing frequency spreading may be configured using a commonly known phase locked loop (PLL) element.

The configuration of the frequency spreading control unit may generate a triangular wave control voltage by integrating the square wave voltage output from the MCU 10 and input the voltage spreading oscillator (VCO) of the PLL device to control it.
The above solution is suitable to be applied to the configuration of the exfoliating skin care device using a BLT (Blt-clamped Langevin-type Transducer) ultrasonic oscillator having a large resonance frequency fluctuation.

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Ultrasonic vibrator is a piezoelectric element (piezoelectric ceramic) and a diaphragm member that are combined with ultrasonic vibration means . It is defined as necessary for skin care devices for keratin or ultrasonic massage.
Defining the terminology and operation principle of each component in the solution of the above problem, PWM (Pulse Width Modulation) means a pulse width modulation method and generates a constant frequency by changing the On Off ratio of the electrical signal waveform In the present invention, it is generated from the MCU to be used as the driving frequency of the ultrasonic vibrator.
Phase Locked Loop (PLL) compares the phases of two electrical signals and outputs a compensation voltage proportional to the phase difference. In the present invention, the synchronized frequency is synchronized with the PWM frequency and used as the driving frequency of the ultrasonic oscillator.
The voltage controlled oscillator ( V CO) is a device in which the oscillation frequency is controlled in proportion to the voltage applied as a voltage controlled oscillator. In the present invention, an oscillator is used to spread the frequency synchronized with the PWM frequency and to drive the ultrasonic oscillator as its frequency output. .
A microcontroller unit (MCU) is an IC in which a digital circuit which is sequentially operated by a program is directly integrated or referred to as a MICOM. It has various functions (movement, addition, subtraction, AND, OR, PWM function, analog voltage sensing, operation, etc.) and is used as the main control device in the present invention.
Tone Decoder is a frequency detection IC that includes a PLL function. When its VCO frequency is set, the Tone Decoder outputs a recognition signal at the same time as the frequency inputted according to the PLL function. IC that plays a role.

By implementing the ground-type ion induction current generation method as described above, it is possible to construct a simple ultrasonic vibrator from which the electric insulation board is removed, and the quantity of use of the piezoelectric element is also reduced, thereby realizing significant cost saving effect and high efficiency of skin beauty device. Will be.

In addition, the method of generating the ground-type ion induction current can be applied irrespective of the structure of the ultrasonic vibrator in the skin care device using the same principle of ultrasonic vibration, so that the ions may be applied to the skin care device for exfoliation or the ultrasonic massage skin care device. It is a proper construction method for parallel introduction functions.

In addition, according to the method of spreading and controlling the driving frequency of the piezoelectric element, it is possible to maintain a stable ultrasonic vibration output in response to the change in the ambient temperature of the ultrasonic vibrator, the use load, or the resonance frequency error. A stable skin care device is realized, including a skin care device using a vibrator.

In the following description of embodiments of the present invention, it is well known to those skilled in the art such as known functions or known configurations that are not related to the structural features of the present invention. In principle, it is omitted.
In the present embodiment, the ultrasonic vibrator is a name of a unit having a piezo element attached to a predetermined structure on which an ultrasonic vibrating plate is formed, and the structure and shape thereof are not limited.
The auxiliary member is a member for maintaining the proper structure of the piezoelectric element and the diaphragm in some ultrasonic vibrators.
The diaphragm transmits the vibration force of the ultrasonic wave to the skin and has a different skin contact surface (vibration plate) according to the purpose of use.
Earth grip is a conductive structure that is usually in contact with the hand to earth the body for iontophoretic function.
The meaning of diffusion here is the same as sweep.

The following embodiment is to configure a characteristic skin care device capable of performing the iontophoretic function through the ultrasonic vibrator that does not form the electrically insulating substrate and the ground-type iontophoretic current generation method.

Figure 1 shows a basic configuration as an embodiment of a ground-type ion current introduction method and a skin care device using the same according to the present invention. To explain this,

MCU 10 for controlling the overall operation of the skin care device,

Power supply unit 16 for supplying the total driving electricity of the skin care device under the control of the MCU (10),

Ultrasonic output unit 18 for generating an ultrasonic drive power under the control of MCU 10 to apply to the ultrasonic vibrator,

An ultrasonic vibrator 19 which electrically connects the ground electrode of the piezoelectric element 30 and the diaphragm (skin contact part) 33 to bring the ultrasonic vibration and the iontophoretic current into contact with the skin,

A square wave voltage output unit 12 generating square wave voltages under the control of the MCU 10 and applying them to the ground-type ion induction current generating unit 14;

Under the control of the MCU 10, a ground type ion induction current generator 14 which causes one pole to output the ion induction current to be grounded at zero potential and selectively alternately outputs the ion current polarity of the other pole. );

An earth grip 20 connected to the ground type ion induction current generator 14 to electrically connect the ion induction current to the human body;
An oscillation controller 21 for controlling the ultrasonic driving frequency;

And a function changeover switch 11 for inputting an operation command to the MCU.

2 shows a configuration of an ultrasonic vibrator 19 according to the present invention.
The metallic auxiliary member 32 is attached to a predetermined position on one surface or both sides in parallel with the flat metal diaphragm 33, and one or more piezoelectric elements 30 are attached to the upper or lower surface of the auxiliary member 32. (The notation of the dotted line indicates the position where it can be selectively bonded.), The ground electrode 31 of the piezoelectric element 30 and the skin contact surface (vibration plate) 33 are electrically connected through the attachment process.

For more reliable electrical connection, it is better to conduct electricity by connecting the ground electrode 31 and the diaphragm 33 with electric wires.

3 is a block diagram showing the characteristics of the ground-type ion induction current generating unit 14 according to the present invention.

In order to assist in a specific understanding, "<conventional diagram for iontophoresis>" has been shown to be included.

The square wave voltage output unit 12 is configured to amplify a frequency of approximately 1 KHz required for ion introduction to a proper voltage under the control of the MCU 10 and apply the amplified voltage to the ground type ion introduction current generating unit 14. Meanwhile, the MCU 10 generates an ion current switching signal synchronized with the 1 KHz to turn on and off the switching element of the ground type ion induction current generator 14.

The ground type ion induction current generating unit 14 is composed of a combination circuit of the MCU 10 control, the square wave voltage output unit 12, and the semiconductor switching element, and the positive phase is synchronized with the phase of the input square wave voltage. °) or inverted phase (180 °) receives the switching signal is turned on or off through the switching element to the ground potential side. The switching signal of the positive phase or the inverted phase is selected according to the iontophoretic function selection command of the function switching switch 11.
Referring to the characteristics of the operation, the square wave voltage input from the square wave voltage output unit 12 is converted into an AC voltage through a capacitor, and is connected to the earth grip output through the switching element of the ground type ion induction current generating unit 14,
At this time, in controlling the switching element according to the ion current switching signal output from the MCU 10 in accordance with the ion function previously selected by the function switching switch 11,
When the switching element is turned on to the ground side in synchronism with the time when the phase of the AC voltage is shown as (+), the output of the earth grip 20 side causes a pulse of negative potential with respect to the ground potential.
When the switching element is turned on to the ground side in synchronism with the time when the phase of the AC voltage is represented by (−), the output of the earth grip 20 side is generated as a pulse of positive potential with respect to the ground potential.
Therefore, "(+) output" or "(-) output" or "(+) and (-) intersect with respect to the skin contact surface [vibration plate] of the ultrasonic vibrator grounded at zero (0 Volt) potential of the electric circuit. The iontophoretic current of "output" is controlled to be output to the earth grip 20 so that it can flow through the human body to the skin contact surface (vibration plate) during the iontophoretic procedure. The frequency of the square wave voltage does not limit the content of the present invention.
A portion of the diaphragm is a skin contact portion for locally supplying an ion current to the skin, and the diaphragm {skin contact part 33) is ground-type ions through attachment of the ground electrode 31 of the piezoelectric element 30 to and. The electric current is energized with the ground 15 of the introduction current generating unit 14 to maintain the zero potential state.

According to the construction of the ground-type ion induction current generating method as described above of the present invention, despite the structure of the ultrasonic vibrator 19 which does not electrically insulate between the piezoelectric element 30 and the diaphragm 33, the skin contact surface [vibration plate] 33 ) And the earth grip 20 to selectively replace the phase of the ion current to enable the output.

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Referring to "<conventional diagram for ion introduction >" shown in Fig. 3B, an electric insulating substrate is inserted to electrically insulate between the piezoelectric element and the diaphragm. Therefore, the ion current is outputted to the "vibration plate" and the "hand contact" separated from the ground electrode of the piezoelectric element.

In addition, the ion current is composed of a method of cross-outputting (+,-) or (-, +) through the diaphragm and the hand contact unit at the same time. Vibration output is remarkably decreased in the back, and numerous inadequate factors such as increase in production cost and poor adhesion of the insulating member and the piezoelectric element are generated.

The above embodiments are not limited to the external structure of the skin care device or the type of ultrasonic vibrator in the scope of application.

The following embodiment is an ultrasonic vibrator and skin that can be used to generate the iontophoretic current generation method in parallel to configure the iontophoretic function through one surface of the ultrasonic element diaphragm (skin contact) plate of grounded zero (0 Volt) potential In providing a beauty device.

As shown in FIG. 3A, the configuration of the ground type ion induction current generator 14 is output to the ground grip 20 based on the zero potential of the ground 15. The skin care device using the same can be selected and implemented by the ultrasonic vibrator 19 of FIG. 2, or the ultrasonic vibrators 19a, 19b, 19c of the same type of FIG. The skin contact surface (vibration plate) of the ultrasonic vibrator is the piezoelectric element (30, 30 ') is in electrical communication with the ground (15) through the ground electrode (31, 31), and thus the skin contact surface [0 Volt] potential [ Diaphragm] 33a, 33b, 33c, it is possible to implement a cosmetic device that outputs an ion current to the earth grip 20 around the center.

Figure 4 , as shown in Figure 3 (A) shows a plurality of ultrasonic vibrators that can be implemented in the skin care device through the method of generating a ground-type ion induction current according to the present invention.

<Embodiment 4-1> is based on the ultrasonic vibrator 19 configured for the beauty machine for the skin of the skin to deform a part of the configuration, by using only one auxiliary member to simplify the horizontal blade on the part side As the ultrasonic vibrator 19a having a blade, the resonant frequency is usually set at about 20 KHz to 50 KHz, but the resonance frequency of about 25 ± 5 KHZ is preferable for the practice of the present invention. It is energized with the ground 15 of the type ion introduction generation part 14. Also,
<Example 4-2> is a form in which a part of the diaphragm is processed into a skin contact surface to use the BLT type ultrasonic vibrator 19b, which is well known for ultrasonic cleaning , for skin beauty, and is usually set to a resonance frequency within 100 KHz. Although the resonant frequency of the ultrasonic vibrator is not limited, a BLT type ultrasonic vibrator having a resonant frequency in the 50 KHz ± 8 KHz error range is preferable for the practice of the present invention.
In addition, the ground electrode 31 ′ is electrically connected to the ground 15 of the ground type ion introduction portion generation unit 14.
<Example 4-3> is generally the most applied to the ultrasonic beauty device and has a diaphragm (skin contact) having a vertex in the shape of a cylindrical shape and a circular shape or a conical shape in plan view, and the cut section has a yaw. It is an ultrasonic vibrator 19c in which a piezoelectric element 30 'is integrated inside the diaphragm processed into a shape, and is preferably set to a resonant frequency of about 500 KHz to 15 MHz for implementation of the present invention. It is electrically connected to the ground 15 of the ground type ion introduction portion generation unit 14.
The ultrasonic vibrator 19c may be deformed into a flat plate structure in which the cut section is not necessarily a yaw shape, but is not limited to a circular shape, and is not limited to the resonance of the ultrasonic vibrator. The frequency can be set irrespective of using the iontophoretic generation method of the present invention.
As in the configuration of the ultrasonic vibrator of the above embodiments <4-1 to 4-3> If no artificial insulation is attempted at all times, the ground electrode 31 'of the piezoelectric element 30' and the skin contact surface (vibration plate) 33a, 33b, 33c are always in an electrically conducting state and are electrically operated. In this case, the insulation member is required as in the conventional configuration of FIG. 3B, but using the ground type ion introduction generation unit 14, the ultrasonic function as shown in FIG. The skin care device capable of simultaneously operating the ion introduction function is possible.
Sometimes, the ground of the ground electrode of the ultrasonic vibrator is different from the zero potential of the circuit due to the circuit configuration of the ultrasonic output unit 18 driving the ultrasonic vibrator.
Although it may be grounded to a ground (15) potential corresponding to a zero (0 Volt) potential, the ion-induced current form output to the earth grip 20 based on the skin contact surface of the ultrasonic vibrator is a ground type ion-introduced form of the present invention. It does not restrict the method of occurrence.
Therefore, the ground 15 potential corresponding to the zero potential is described in the configuration of the present invention in the same manner as the zero potential potential ground.
The features of the present invention ascertained through the above embodiment are not limited to the shape of the ultrasonic vibrator in such a manner that the skin contact surface [vibration plate] is grounded to zero (0 Volt) potential and the ion introduction function through the earth grip 20 side. It becomes a skin care device that can be combined.

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The following embodiments are the characteristics of the resonance frequency change according to the ambient temperature or load variation of the ultrasonic vibrator Resonant frequency  In accordance with the error to provide a skin care device to minimize the decrease in the ultrasonic vibration output.

5 shows a characteristic change of the piezoelectric element according to the present invention.
In the characteristics of the piezoelectric element 30, the driving impedance is also changed according to the change of the resonance frequency according to the influence of the ambient temperature or the use load, and the variation of the driving impedance causes a decrease in the ultrasonic output. In order to solve such a problem, according to the configuration of FIG. 1, the MCU 10 generates an ultrasonic driving frequency suitable for the piezoelectric element 30 through the PWM frequency setting and applies it to the PWM frequency synchronization unit 17. Synchronize with PLL oscillation frequency. The VCO frequency in the synchronized state is applied to the ultrasonic output unit 18 through a suitable buffer.
(PWM frequency can be generated through MCU, PWM IC, TONE DECODER IC)
The frequency spreading control unit 13 integrates the square wave voltage of the control frequency generated from the MCU 10 and generates a triangular waveform control voltage. The generated control voltage is again adjusted to a predetermined magnitude and applied to the VCO of the PWM frequency synchronization unit 17 to spread the PLL oscillation frequency. The variation range of the spreading frequency is determined according to the magnitude of the VCO control voltage. The change width is set by adjusting the magnitude of the control voltage so that the up and down anticipated width (+,-) is exceeded based on the intrinsic resonance frequency of the piezoelectric element 30, and at the same time, the change of the MCU 10 The control frequency is set to vary.
(The control frequency is usually used by MCU, but can also be used as a general oscillator circuit)
Therefore, the diffusion frequency applied to the ultrasonic output unit 18 coincides with the actual resonant frequency of the piezoelectric element twice in one change cycle and decreases the output of the ultrasonic vibration due to the variation of the resonance frequency of the ultrasonic element. It can be minimized.
It is preferable to use a PLL IC to implement the PWM frequency synchronization unit 17 and the frequency spreading control unit 13, but the type thereof is not limited. In this embodiment, it is preferable to use the PLL function of the LMC567 used as the tone decoder.
The above embodiment is mainly applied as a method corresponding to a frequency change when driving a BLT (Bolt-clamped Langevin-type Transducer) type ultrasonic vibrator, and is not necessary in a skin care device using other ultrasonic vibrators.

The above embodiment is not limited to the shape of the ultrasonic vibrator in the scope of application.

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It is noted that the above embodiments do not limit the scope of the claims.

The skin beauty device and the composition method using the ultrasonic and iontophoretic functions are generally the same, but industrially, there are a large number of products with various external structures and features. In particular, the demand for skin care devices is continuously increasing internationally, and thus, competition in the export market is increasing, especially in the manufacturing and sales industries. The skin care device and composition method of the present invention are not only to reduce the manufacturing cost but also to improve the cosmetic effect and bring about the stability of the product, and at the same time as the conventional configuration method of the skin care device including the equivalent ultrasonic and ion functions. The differentiated method is to produce competitive products and to increase the competitiveness of foreign exports.

1 is a basic configuration of a method of generating a ground-type ion induction current and a skin care device using the same according to the present invention.

2 is a cross-sectional view showing the configuration of an ultrasonic vibrator according to the present invention.

Figure 3 is a block diagram showing the characteristics of the ground-type ion induction current generating method according to the present invention.

Figure 4 is a block diagram showing an embodiment with an equivalent ultrasonic vibrator that can be used in the skin care device through the ground-type ion induction current generation method according to the present invention.

5 is a characteristic diagram showing a characteristic change of a piezoelectric element according to the present invention;

<Code Description of Main Parts of Drawing>

10: MCU

11: function selector switch

12: square wave voltage output unit

13: Frequency spread controller

14: ground type ion current input unit

15: Ground

16: power supply

17: PWM frequency synchronizer

18: ultrasonic output unit

19, 19a, 19b, 19c: ultrasonic vibrators
20: Earth grip
21: oscillation control unit

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30, 30 ': piezoelectric element

31, 31 ': grounding electrode

32, 32a: auxiliary member

33, 33a, 33b, 33c: Vibration plate [skin contact part]

Claims (7)

An ultrasonic vibrator in unit form in which one surface of the diaphragm is composed of a skin contact surface and a piezoelectric element is attached to the other surface of the diaphragm; An earth grip 20 for energizing an iontophoretic current to the human body is provided. In the skin care device that combines the ultrasonic and iontophoretic function, The iontophoretic function is a means for simultaneously outputting an iontophoretic current through the skin contact surface of the ultrasonic vibrator and indirectly (0 Volt) potential of the circuit through the ground electrodes 31 and 31 'of the piezoelectric elements 30 and 30'. "(+) Output" or "to the earth grip 20 side with reference to the skin contact surface (vibration plate) 33,33a, 33b, 33c of the ultrasonic vibrator grounded at 0, or the zero (0 Volt) potential of the circuit as a reference point. Selectively outputs an iontophoretic current of (-) output "or" output where (+) and (-) intersect ", the output being directed to the skin contact surface [vibration plate] through the human body in contact with the earth grip 20 In a energized manner Skin care device characterized in that it consists of a ground-type iontophoretic current generating unit (14). delete The method of claim 1, wherein the ultrasonic vibrator, One or more conductive auxiliary members 32 are attached to one side or both sides of the blade contact plate (vibration plate) 33 and a portion thereof in parallel with the plate, and at least one piezoelectric element on the surface of the auxiliary member. An element is attached, and the electrical insulation member is excluded from the attachment structure, and the skin contact surface (vibration plate) 33 is an ultrasonic vibrator 19 through which the ground electrode 31 of the piezoelectric element 30 is energized . ; Alternatively, a skin contact surface (vibration plate) 33a of a blade-shaped flat plate extending from a central portion of one conductive auxiliary member 32a to a side thereof protrudes horizontally from the auxiliary member 32a and the auxiliary member 32a. At least one ultrasonic element 30 'is attached to the attachment structure, and an electrical insulation member is excluded from the attachment structure, and the skin contact surface [vibration plate] 33a is ultrasonically energized with the ground electrode of the piezoelectric element. Oscillator 19a ; Alternatively, the length from one surface of the piezoelectric element 30 'fastened to the cylindrical body or the end of the ground electrode 31' to the end of the skin contact surface (vibration plate) 33b is set to 30 mm or more and less than 39 mm. The contact surface (vibration plate) 33b is energized with the ground electrode of the piezoelectric element, and the piezoelectric element 30 'is a BLT (Bolt-clamped Langevin-type Transducer) type ultrasonic vibrator having a resonant frequency of 50KHz ± 8KHz. 19b) ; Skin care device, characterized in that consisting of. The method of claim 1 The skin care device, BLT (Bolt-clamped Langevin-type Transducer) type, the skin contact surface (vibration plate) (33b) extends a certain length from the piezoelectric element 30 'fastened to a cylindrical body in the center portion, the skin contact surface (vibration plate) ( 33b) includes an ultrasonic vibrator 19b which is energized with the ground electrode 31 'of the piezoelectric element 30'; Alternatively, the piezoelectric element 30 'is attached to the inner side of the cylindrical body and the bottom of the skin contact surface [vibration plate] 33c in the shape of a disc or a protruding cone, and the cut section is concave, and the skin contact surface [vibration plate] ( An ultrasonic vibrator 19c in which 33c and the ground electrode 31 'of the piezoelectric element 30' are energized; Alternatively, the ultrasonic vibrator 19c is an ultrasonic vibrator which is deformed into a disc or polygonal flat plate having a cut cross section, and at least one piezoelectric element 30 'is attached to one surface thereof, and the other surface thereof is a skin contact surface [vibration plate]; In using Skin care device, characterized in that it further comprises a grounding type ion induction current generating unit (14) as a means for outputting the ion induction current in parallel. The skin care device of claim 1, 3, or 4, In configuring the ultrasonic function, By generating a predetermined ultrasonic drive frequency, The ultrasonic driving frequency is spread at a predetermined period in accordance with the pre-calculated resonance frequency fluctuation bandwidth of the ultrasonic vibrator, and the output of the spread ultrasonic driving frequency comprehensively drives the ultrasonic resonance frequency fluctuation bandwidth range to stabilize the ultrasonic wave. PWM frequency synchronization unit 17 as a configuration means for outputting vibration; Skin care device further comprises a frequency diffusion control unit (13). delete delete

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